1978900

素因数分解:

$2^2\times 5^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{257}}^1$

素因数の和:289

約数の個数: 72

約数和(自身を含む): 5374656

約数和(自身を除く): 3395756

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 25, 28, 35, 44, 50, 55, 70, 77, 100, 110, 140, 154, 175, 220, 257, 275, 308, 350, 385, 514, 550, 700, 770, 1028, 1100, 1285, 1540, 1799, 1925, 2570, 2827, 3598, 3850, 5140, 5654, 6425, 7196, 7700, 8995, 11308, 12850, 14135, 17990, 19789, 25700, 28270, 35980, 39578, 44975, 56540, 70675, 79156, 89950, 98945, 141350, 179900, 197890, 282700, 395780, 494725, 989450, 1978900]

約数ペア:

[(1, 1978900), (2, 989450), (4, 494725), (5, 395780), (7, 282700), (10, 197890), (11, 179900), (14, 141350), (20, 98945), (22, 89950), (25, 79156), (28, 70675), (35, 56540), (44, 44975), (50, 39578), (55, 35980), (70, 28270), (77, 25700), (100, 19789), (110, 17990), (140, 14135), (154, 12850), (175, 11308), (220, 8995), (257, 7700), (275, 7196), (308, 6425), (350, 5654), (385, 5140), (514, 3850), (550, 3598), (700, 2827), (770, 2570), (1028, 1925), (1100, 1799), (1285, 1540)]